#include <cr.h>
#include <entt/entity/registry.hpp>
#include "../common/types.h"
namespace plugin {

CR_EXPORT int cr_main(cr_plugin *ctx, cr_op operation) {
  switch (operation) {
    case CR_STEP: {
      // forces things to break
      auto &registry = *static_cast<entt::registry *>(ctx->userdata);

      // forces the creation of the pool for the velocity component
      static_cast<void>(registry.storage<velocity>());

      const auto view = registry.view<position>();
      registry.insert(view.begin(), view.end(), velocity{1., 1.});

      registry.view<position, velocity>().each([](position &pos, velocity &vel) {
        pos.x += static_cast<int>(16 * vel.dx);
        pos.y += static_cast<int>(16 * vel.dy);
      });
    }
      break;
    case CR_CLOSE:
    case CR_LOAD:
    case CR_UNLOAD:
      // nothing to do here, this is only a test.
      break;
  }

  return 0;
}
}